EP 2221803 A2 20100825 - Masking sound generating apparatus, masking system, masking sound generating method, and program
Title (en)
Masking sound generating apparatus, masking system, masking sound generating method, and program
Title (de)
Maskiergeräuscherzeugungsvorrichtung, Maskiersystem, Maskiergeräuscherzeugungsverfahren und Programm
Title (fr)
Appareil de génération de son de masquage, système de masquage, procédé de génération de son de masquage et programme
Publication
Application
Priority
- JP 2009036627 A 20090219
- JP 2010033441 A 20100218
Abstract (en)
In a masking sound generating apparatus, a band divider divides a target sound signal into a plurality of frequency bands to generate a plurality of band signals. An envelope signal generating part generates a plurality of envelope signals representing respective envelopes of the plurality of the band signals. A signal converter segments each of the plurality of the envelope signals into a plurality of frames, then specifies frames of segmented envelope signals which have an amplitude greater than a first threshold and less than a second threshold, and changes an order of the specified frames in an arrangement of the plurality of the frames. A multiplier multiplies each of the plurality of the envelope signals by a noise signal, each envelope signal having the order of the frames changed by the signal converter, and outputs the plurality of the envelope signals multiplied by the noise signal as individual band masking signals. An adder adds the individual band masking signals to output a masking sound signal capable of masking the target sound signal.
IPC 8 full level
G10K 11/175 (2006.01)
CPC (source: EP US)
G10K 11/1752 (2020.05 - EP US); H04K 1/04 (2013.01 - EP US); H04K 3/46 (2013.01 - EP US); H04K 3/825 (2013.01 - EP US); H04K 1/02 (2013.01 - EP US); H04K 1/06 (2013.01 - EP US); H04K 3/43 (2013.01 - EP US); H04K 2203/12 (2013.01 - EP US)
Citation (applicant)
JP 2008233671 A 20081002 - YAMAHA CORP
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
EP 2221803 A2 20100825; JP 2010217883 A 20100930; JP 5691191 B2 20150401; US 2010208912 A1 20100819; US 8428272 B2 20130423
DOCDB simple family (application)
EP 10153947 A 20100218; JP 2010033441 A 20100218; US 70875110 A 20100219